CN1847779A - Magnetic scale - Google Patents

Magnetic scale Download PDF

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Publication number
CN1847779A
CN1847779A CNA2006100820947A CN200610082094A CN1847779A CN 1847779 A CN1847779 A CN 1847779A CN A2006100820947 A CNA2006100820947 A CN A2006100820947A CN 200610082094 A CN200610082094 A CN 200610082094A CN 1847779 A CN1847779 A CN 1847779A
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CN
China
Prior art keywords
magnetic
pipe
preferred
magnetic element
longitudinal direction
Prior art date
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Granted
Application number
CNA2006100820947A
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Chinese (zh)
Other versions
CN100385195C (en
Inventor
柴田昌幸
落合治
长井祐治
前岛英生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DMG Mori Co Ltd
Original Assignee
Sony Corp
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Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of CN1847779A publication Critical patent/CN1847779A/en
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Publication of CN100385195C publication Critical patent/CN100385195C/en
Expired - Fee Related legal-status Critical Current
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)

Abstract

Disclosed herein is a magnetic scale including a pipe and a polarizable magnetic member closely attached to the inner surface of the pipe so as to extend in the longitudinal direction of the pipe. The magnetic member is formed with magnetic marks provided by a plurality of N poles and S poles alternately arranged in the longitudinal direction of the magnetic member. Accordingly, the magnetic member can be reliably protected to thereby improve its durability.

Description

Magnetic scale
The cross reference of related application
The application comprises the relevant theme of submitting in Jap.P. office with on March 29th, 2005 of Japanese patent application JP2005-093611, and the full content of this application is incorporated herein by reference.
Technical field
The magnetic scale that the present invention relates in position probing, use.
Background technology
For example, at Jap.P. the location detecting apparatus that has proposed to be used for detecting the printer print head position in clear 62-226007 number is disclosed.
This location detecting apparatus comprises magnetic scale and magnetic sensor.This magnetic scale has magnetic mark, and this magnetic mark is formed on the outer surface of the guide shaft that is used for this printhead of axial lead, and arranges along the longitudinal direction of this guide shaft.This magnetic sensor and this printhead integrate, and detect the changes of magnetic field of this magnetic mark, output detection signal thus.
Then, this detection signal according to from this magnetic sensor output obtains the position of this printhead on this guide shaft longitudinal direction.
This location detecting apparatus with magnetic scale needing to be widely used in various lathes, printer, automation of position probing etc.
In above-mentioned location detecting apparatus, the magnetic element of magnetic scale is exposed to the outside of this device.Therefore, install under the situation of this location detecting apparatus on lathe etc., have such possibility, promptly object may clash into this magnetic element and damage it, perhaps cutting fluid may adhere on this magnetic element and corrode it, has caused in the defective of guaranteeing aspect the permanance of this magnetic scale.
Summary of the invention
Therefore need provide a kind of magnetic scale, thereby it can protect reliably the magnetic element that is included in wherein to improve its permanance.
According to the present invention, a kind of magnetic scale is provided, it comprises: pipe; With polarizable magnetic element, this polarizable magnetic element close attachment is to this pipe internal surface, and consequently the longitudinal direction along this pipe extends; This magnetic element is formed with magnetic mark, extremely provides this magnetic mark by a plurality of N utmost points and the S that alternately arranges on the longitudinal direction of this magnetic element.
According to the present invention, the magnetic element that will comprise this magnetic mark is arranged in the inside of this pipe.Therefore, this magnetic element can be subjected to the protection of this pipe, may avoid such problem thus, promptly avoids object may clash into this magnetic element and damages it or cutting fluid may adhere on this magnetic element and corrodes it.Therefore, can guarantee the permanance of this magnetic scale.
With reference to accompanying drawing, from following detailed and additional claim, other purpose of the present invention and feature can more fully be understood.
Description of drawings
Figure 1A is the magnetic scale cut-open view according to first preferred embodiment of the invention;
Figure 1B is the view of the direction shown in the arrow B in Figure 1A;
Fig. 2 A is to use the synoptic diagram of the combined location detecting apparatus of detection head of the magnetic scale shown in Figure 1A and the 1B;
Fig. 2 B is to use the synoptic diagram of the detection head divergence type location detecting apparatus of the magnetic scale shown in Figure 1A and the 1B;
Fig. 3 A is the cut-open view according to the magnetic scale of second preferred embodiment of the invention;
Fig. 3 B is the cut-open view according to the magnetic scale of third preferred embodiment of the invention;
Fig. 3 C is the cut-open view according to the magnetic scale of four preferred embodiment of the invention;
Fig. 3 D is the cut-open view according to the magnetic scale of fifth preferred embodiment of the invention;
Fig. 3 E is the cut-open view according to the magnetic scale of sixth preferred embodiment of the invention;
Fig. 4 A is the cut-open view according to the magnetic scale of seventh preferred embodiment of the invention;
Fig. 4 B is the cut-open view according to the magnetic scale of eighth preferred embodiment of the invention;
Fig. 4 C is the cut-open view according to the magnetic scale of ninth preferred embodiment of the invention;
Fig. 4 D is the cut-open view according to the magnetic scale of tenth preferred embodiment of the invention;
Fig. 4 E is the cut-open view according to the magnetic scale of eleventh preferred embodiment of the invention.
Embodiment
(first preferred embodiment)
Referring now to accompanying drawing first preferred embodiment of the present invention is described.
Figure 1A is the cut-open view according to the magnetic scale 10 of the first excellent embodiment, and Figure 1B is the view of the direction shown in the arrow B in Figure 1A.
Fig. 2 A is the synoptic diagram according to the location detecting apparatus 100 of this magnetic scale 10 of use of first preferred embodiment.
As shown in Fig. 2 A, this location detecting apparatus 100 comprises magnetic scale 10 and detection head 40, and this detection head 40 is supported by magnetic scale 10, so that removable along this magnetic scale 10.
As shown in Figure 1A and 1B, this magnetic scale 10 comprises pipe 20 and magnetic element 30.
This pipe 20 is cylindrical elements, and it is not formed by the magnetic force of this magnetic element 30 not being had a material of magnetic effect.
More specifically, this pipe 20 is by forming such as the nonmagnetic substance of stainless steel 304 (JIS).And pipe 20 material can have weak magnetic, as long as it does not have magnetic effect to the magnetic force of this magnetic element 30.
These magnetic element 30 close attachment and are extended on the longitudinal direction of this pipe 20 on this pipe inside surface 22 of 20.
This magnetic element 30 is ribbon elements, and it has close attachment at the outside surface 32 of the inside surface 22 of this pipe 20 be exposed to this inside surface of managing 20 inner spaces 34.
More specifically, these magnetic element 30 close attachment are managed the circumferential section of 20 inside surfaces 22 at this, and along this pipe straight extension of longitudinal direction of 20.
This magnetic element 30 is polarizable elements, and it is formed with magnetic mark, extremely provides this magnetic mark by the longitudinal direction along this magnetic element 30 with a plurality of N utmost points and the S that gives the determining deviation arranged alternate.In other words, this magnetic element 30 is formed with the magnetic mark that comprises periodic signal, so the N utmost point and the alternately variation on the longitudinal direction of this magnetic element 30 of the S utmost point.Again in other words, periodic magnetic chart is recorded in this magnetic element 30, so the N utmost point and the S utmost point are along the longitudinal direction alternate of this magnetic element 30.
This magnetic element 30 is formed by the resilient material such as magnetic rubber.
By using double faced adhesive tape to bring the outside surface 32 of bonding this magnetic element 30 and the inside surface 22 of this pipe 20, realize that this magnetic element 30 manages being connected of 20 inside surfaces 22 with this.Like this, the outside surface 32 of this magnetic element 30 is by the inside surface 22 of double sticky tape close attachment to this pipe 20.
This double sticky tape can be replaced by bonding agent.
The polarization of this magnetic element 30, i.e. the formation of this magnetic mark realizes by using special-purpose polarization device.
This polarization device has magnetic head and driving circuit, and this driving circuit is used to provide drive current to arrive this magnetic head, produces magnetic field from this magnetic head thus.
Be exposed at magnetic head under the situation of this magnetic element 30 this polarization device, magnetic head relatively moves on the longitudinal direction of this magnetic element 30, to be applied on this magnetic element 30 from the magnetic field of this magnetic head simultaneously, form thus along the longitudinal direction of this magnetic element 30 to give the N utmost point and the S utmost point of determining deviation arranged alternate, promptly form this magnetic mark.
After this magnetic element 30 is attached to the inside surface 22 of this pipe 20, can in this magnetic element 30, form this magnetic mark.In this case, the magnetic head of this polarization device is exposed to the outside surface of this pipe 20, and will be applied to this inner member 30 by this pipe 20 from the magnetic field of this magnetic head.Selectively, can before being attached to the inside surface 22 of this pipe 20, this magnetic element 30 in this magnetic element 30, form this magnetic mark.In this case, the magnetic head with this polarization device directly is exposed to this magnetic element 30 that separates with this pipe 20.
After the inside surface 22 that this magnetic element 30 is attached to this pipe 20, form under the situation of this magnetic mark, can eliminate this magnetic element 30 to the alignment error of the inside surface 22 of this pipe 20 maybe the distortion of this pipe 20 to the influence of the spacing that will be formed on the N utmost point in this magnetic element 30 and the S utmost point.Therefore, the magnetic field of self poling device is applied directly on the magnetic element 30 that separates with this pipe 20 with the situation that forms magnetic mark and compares with future, can guarantee the precision of this magnetic mark, and can therefore accurately obtain detection signal by this detection head 40 (referring to Fig. 2 A).
As shown in Fig. 2 A, this detection head 40 comprises sliding bottom 42 and magnetic sensor 44.
This sliding bottom 42 has bearing, should manage 20 by this bearing and insert, and therefore in mode slidably on the longitudinal direction of this pipe 20, by this bearing this sliding bottom 42 is supported on this pipe 20 slidably.
This magnetic sensor 44 is configured in this sliding bottom 42, and it is oriented to relative with the magnetic element 30 of this magnetic scale 10, and between limits given spacing.
This magnetic sensor 44 is used to detect magnetic field and according to detected magnetic field intensity output detection signal.For example, magnetoresistive element (magnetoresistive transducer) is used as this magnetic sensor 44.This magnetoresistive element work is so that resistance changes according to the variation that applies magnetic field.
Therefore, when the longitudinal direction along this pipe 20 moves this detection head 40 and is formed at magnetic mark in this magnetic element 30 with detection, can from this magnetic sensor 44, obtain the detection signal of cyclical variation (for example, sinusoidal variations).
Such detection signal is provided to the known testing circuit of prior art by lead 46 from this magnetic sensor 44, detects of the displacement of this detection head 40 by this testing circuit thus with respect to this magnetic scale 10.
According to the magnetic scale in this preferred embodiment 10, the magnetic element 30 that will comprise this magnetic mark is arranged in the inside of this pipe 20.Therefore, this magnetic element 30 can be subjected to the protection of this pipe 20.More specifically, might prevent such problem, prevent that promptly object from may clash into this magnetic element 30 damaging it, or prevent that cutting fluid from may adhere on this magnetic element 30 and corrode it.Therefore, can guarantee the permanance of this magnetic scale 10.
Can be about to this magnetic element 30 and be arranged on the inside surface 22 of this pipe 20 with this magnetic scale 10 of so simple structural arrangements.Therefore, the support component that does not need to provide any supports this magnetic element 30, realizes that thus cost reduces and size reduces.
As with the preferred embodiment in the same, this magnetic scale 10 is being used under the situation of location detecting apparatus 100, this pipe 20 can be used as director element, is used to be slidably supported this detection head 40.Therefore, do not need to provide any director element to guide this detection head 40, realize that thus cost reduces and size reduces.
Be not limited to a kind of like this location detecting apparatus 100 of the composite type that detection head 40 and pipe 20 are made up shown in Fig. 2 A according to the application of magnetic scale 10 of the present invention.For example, this magnetic scale 10 can also be applied to the divergence type location detecting apparatus 100 as shown in Fig. 2 B, so this detection head 40 is not slidably supported on this pipe 20, but separated with pipe 20.
(second preferred embodiment)
Second preferred embodiment of the present invention is described now.
Fig. 3 A is the cut-open view according to the magnetic scale 10 of second preferred embodiment.Similar or corresponding in the following description parts are used with those and are represented in the same reference numerals shown in Figure 1A.
The difference of second preferred embodiment and first preferred embodiment is the shape of this magnetic element 30.
As shown in Fig. 3 A, this magnetic element 30 is the rod type elements with the xsect that is full of whole pipe 20 inner spaces.
More specifically, this magnetic element 30 is bar-shaped solid post linear elements, and it has the circular cross section that is full of the whole cylindrical interior space that the inside surface 22 by this pipe 20 limits.The external diameter of this magnetic element 30 is slightly less than the internal diameter of this pipe 20.
Outside surface 32 close attachment of this magnetic element 30 are to the inside surface 22 of this pipe 20, and this magnetic element 30 is along the straight extension of longitudinal direction of this pipe 20.
As in first preferred embodiment, this magnetic element 30 is polarizable elements, and it is formed with magnetic mark, provides this magnetic mark by the longitudinal direction along this magnetic element 30 with a plurality of N utmost points and the S utmost point of giving the determining deviation arranged alternate.And this magnetic element 30 is formed by the resilient material such as magnetic rubber.
By using the polarization that realizes this magnetic element 30 with the similar polarization device of in first preferred embodiment, mentioning of polarization device, the i.e. formation of magnetic mark.
By using bonding agent that the outside surface 32 of this magnetic element 30 is bonding with the inside surface 22 of this pipe 20, realize that this magnetic element 30 manages being connected of 20 inside surfaces 22 with this.
According to second preferred embodiment, can show the effect similar to those effects of first preferred embodiment.And, compare with first preferred embodiment, can increase the volume of the magnetic element 30 of this magnetic scale 10 of per unit length.Therefore,, can increase this and manage surface magnetic flux density on 20 outside surfaces, therefore can guarantee from the voltage level of the detection signal of magnetic sensor 44 outputs of this detection head 40 by increasing the magnetic field intensity of this magnetic element 30.
And, according to second preferred embodiment, the magnetic field that on the whole zone of the axis that centers on this pipe 20, produces this magnetic element 30 equably.Therefore, the magnetic sensor 44 of not considering this detection head 40 can obtain detection signal around the location of the axis of this pipe 20, thereby can guarantee the dirigibility of the layout of this magnetic scale 10 and this detection head 40.
(the 3rd preferred embodiment)
The 3rd preferred embodiment of the present invention is described now.
Fig. 3 B is the cut-open view according to the magnetic scale 10 of the 3rd preferred embodiment.
The difference of the 3rd preferred embodiment and first preferred embodiment is the shape of magnetic element 30.
As shown in Fig. 3 B, this magnetic element 30 is the open column shape elements that tightly fit to the total inner surface 22 of this pipe 20.
More specifically, this magnetic element 30 is the tube elements with annular cross section, and the external diameter of this tube element is slightly less than the internal diameter of this pipe 20.Outside surface 32 close attachment of this magnetic element 30 are to the inside surface 22 of this pipe 20, and this magnetic element 30 is along the straight extension of longitudinal direction of this pipe 20.
As in first preferred embodiment, this magnetic element 30 is polarizable elements, and it is formed with magnetic mark, extremely provides this magnetic mark by the longitudinal direction along this magnetic element 30 with a plurality of N utmost points and the S that gives the determining deviation arranged alternate.And this magnetic element 30 is formed by the resilient material such as magnetic rubber.
By using and the similar polarization device of in first preferred embodiment, mentioning of polarization device, realize the polarization of this magnetic element 30, i.e. the formation of this magnetic mark.
By using bonding agent that the outside surface 32 of this magnetic element 30 is bonding with the inside surface 22 of this pipe 20, realize being connected of inside surface 22 of this magnetic element 30 and this pipe 20.
According to the 3rd preferred embodiment, can show the effect similar to those effects of first preferred embodiment.And, as in second preferred embodiment, the magnetic field that on the whole zone of the axis that centers on this pipe 20, produces this magnetic element 30 equably.Therefore, the magnetic sensor 44 of not considering this detection head 40 can obtain detection signal around the location of the axis of this pipe 20, guarantees the dirigibility of the layout of this magnetic scale 10 and this detection head 40 thus.
(the 4th preferred embodiment)
The 4th preferred embodiment of the present invention is described now.
Fig. 3 C is the cut-open view according to the magnetic scale 10 of the 4th preferred embodiment.
The difference of the 4th preferred embodiment and first preferred embodiment is the shape of this magnetic element 30.
As shown in Fig. 3 C, these magnetic element 30 close attachment are to the circumferential section of this pipe inside surface 22 of 20, and along the straight extension of longitudinal direction of this pipe 20.
More specifically, this magnetic element 30 is the semicolumn elements with semi-circular cross-section of the hemicycle cylindrical inner space that is full of this pipe 20.Therefore, the outside surface 32 of this magnetic element 30 forms the semicolumn surface of close attachment to the inside surface 22 of this pipe 20, and this magnetic element 30 is along the straight extension of longitudinal direction of this pipe 20.
As in first preferred embodiment, this magnetic element 30 is polarizable elements, and it is formed with magnetic mark, extremely provides this magnetic mark by the longitudinal direction along this magnetic element 30 with a plurality of N utmost points and the S that gives the determining deviation arranged alternate.And this magnetic element 30 is formed by the resilient material such as magnetic rubber.
By using and the similar polarization device of in first preferred embodiment, mentioning of polarization device, realize the polarization of this magnetic element 30, i.e. the formation of this magnetic mark.
By using bonding agent that the outside surface 32 of this magnetic element 30 is bonding with the inside surface 22 of this pipe 20, realize being connected of inside surface 22 of this magnetic element 30 and this pipe 20.
According to the 4th preferred embodiment, can show those effect similar effects with first preferred embodiment.And, as in second preferred embodiment, compare the volume of the magnetic element 30 that can increase this magnetic scale 10 of per unit length with first preferred embodiment.Therefore,, can be increased in the surface magnetic flux density on the outside surface of this pipe 20, can guarantee thus from the voltage level of the detection signal of magnetic sensor 44 outputs of this detection head 40 by increasing the magnetic field intensity of this magnetic element 30.
(the 5th preferred embodiment)
The 5th preferred embodiment of the present invention is described now.
Fig. 3 D is the cut-open view according to the magnetic scale 10 of the 5th preferred embodiment.
The difference of the 5th preferred embodiment and first preferred embodiment is the mounting structure of this magnetic element 30.
As shown in Fig. 3 D, groove 24 is formed on this circumferential section of managing 20 inside surfaces 22, consequently manages 20 the straight extension of longitudinal direction along this.
This magnetic element 30 exactly is fit to this groove 24.Outside surface 32 close attachment of this magnetic element 30 are to the bottom surface 2402 of the groove 24 of this pipe 20, and this magnetic element 30 is along the straight extension of longitudinal direction of this pipe 20.
As in first preferred embodiment, this magnetic element 30 is polarizable elements, and it is formed with magnetic mark, extremely provides this magnetic mark by the longitudinal direction along this magnetic element 30 with a plurality of N utmost points and the S that gives the determining deviation arranged alternate.And this magnetic element 30 is formed by the resilient material such as magnetic rubber.
By using and the similar polarization device of in first preferred embodiment, mentioning of polarization device, realize the polarization of this magnetic element 30, i.e. the formation of this magnetic mark.
By using bonding agent that the outside surface 32 of magnetic element 30 is bonding with the bottom surface 2402 of this groove 24, realize being connected of magnetic element 30 and the bottom surface 2402 of managing 20 groove 24.
According to the 5th preferred embodiment, can show effect similar effects with those first preferred embodiments.And owing to this magnetic element 30 matches with being formed on this groove 24 of managing on 20 inside surfaces 22, so the distance between the outside surface of the outside surface 32 of this magnetic element 30 and this pipe 20 can reduce.Therefore, can increase this and manage surface magnetic flux density on 20 outside surfaces, can guarantee the voltage level of the detection signal of output from the magnetic sensor 44 of this detection head 40 thus.
Especially, even under the situation of the wall thickness that increases this pipe 20, also can guarantee the voltage level of the detection signal exported from the magnetic sensor 44 of this detection head 40 with the length of guaranteeing this pipe 20.
(the 6th preferred embodiment)
The 6th preferred embodiment of the present invention is described now.
Fig. 3 E is the cut-open view according to the magnetic scale 10 of the 6th preferred embodiment.
Difference part between the 6th preferred embodiment and first preferred embodiment is the shape of this pipe 20.
Shown in Fig. 3 E, the wall that slit 26 passes this pipe 20 forms at its circumferential section, consequently manages 20 the straight extension of longitudinal direction along this.
In other words, the inner space of this pipe 20 communicates by this slit 26 with its space outerpace.
Equally, form under the situation of this slit 26, can show those effect similar effects with first preferred embodiment at the wall that passes pipe 20 by this way.
(the 7th preferred embodiment)
The 7th preferred embodiment of the present invention is described now.
Fig. 4 A is the cut-open view according to the magnetic scale 10 of the 7th preferred embodiment.
The difference of the 7th preferred embodiment and the first excellent embodiment is that this pipe 20 is rectangular column linear elements, and these magnetic element 30 close attachment are to forming on one of these four sides of managing 20 inside surfaces 22.Other structure and first preferred embodiment similar.
According to the 7th preferred embodiment, can show those effect similar effects with first preferred embodiment.
(the 8th preferred embodiment)
The 8th preferred embodiment of the present invention is described now.
Fig. 4 B is the cut-open view according to the magnetic scale 10 of the 8th preferred embodiment.
The difference of the 8th preferred embodiment and second preferred embodiment is that this pipe 20 is rectangular column linear elements, and this magnetic element 30 is the Filled Rectangle shaped elements that are full of the entire inner space of this pipe 20.Other structure and second preferred embodiment similar.
According to the 8th preferred embodiment, can show those effect similar effects with second preferred embodiment.
(the 9th preferred embodiment)
The 9th preferred embodiment of the present invention is described now.
Fig. 4 C is the cut-open view according to the magnetic scale 10 of the 9th preferred embodiment.
The difference of the 9th preferred embodiment and the 3rd preferred embodiment is that this pipe 20 is rectangular column linear elements, and this magnetic element 30 hollow rectangle element that is close attachment on the total inner surface 22 of this pipe 20.Other structure and the 3rd preferred embodiment similar.
According to the 9th preferred embodiment, can show those effect similar effects with the 3rd preferred embodiment.
(the tenth preferred embodiment)
The tenth preferred embodiment of the present invention is described now.
Fig. 4 D is the cut-open view according to the magnetic scale 10 of the tenth preferred embodiment.
The difference of the tenth preferred embodiment and the 4th preferred embodiment is that this pipe 20 is rectangular column linear elements, and this magnetic element 30 is the Filled Rectangle shaped elements that are full of half inner space of this pipe 20 substantially.Other structure and the 4th preferred embodiment similar.
According to the tenth preferred embodiment, can show those effect similar effects with the 4th preferred embodiment.
(the 11 preferred embodiment)
The 11 preferred embodiment of the present invention is described now.
Fig. 4 E is the cut-open view according to the magnetic scale 10 of the 11 preferred embodiment.
The difference of the 11 preferred embodiment and the 5th preferred embodiment is that this pipe 20 is rectangular column linear elements, be formed on this groove 24 and form on one of these four sides of managing 20 inside surfaces 22, extending along this pipe longitudinal direction of 20, and this magnetic element 30 matches consequently close attachment to the bottom surface 2402 of this groove 24 with this groove 24.Other structure and the 5th preferred embodiment similar.
According to the 11 preferred embodiment, can show those effect similar effects with the 5th preferred embodiment.
Though this magnetic element 30 is formed by the resilient material such as magnet rubber in each preferred embodiment, but the material of this magnetic element 30 is not limited to this material, but any other polarizable material can be used for this magnetic element 30 such as plastic magnet, magnetic material coating layer element and ferrite magnetic material.
And, though in each preferred embodiment by using double sticky tape or bonding agent to realize being connected of this magnetic element 30 and this pipe 20, but inner space that can be by powdered magnetic material being filled into this pipe 20 is forming needed shape with this magnetic material, thereby this magnetic element 30 is installed to the inside of this pipe 20.
And though the xsect of this pipe 20 is circle or rectangle in each preferred embodiment, the xsect of this pipe 20 can be any other shape, comprises ellipse and polygon.
Though invention has been described with reference to specific embodiment, this description is illustrative, does not constitute limitation of the scope of the invention.Under the situation that does not depart from the spirit and scope of the present invention that limit by additional claim,, can make various modifications and variations for those skilled in the art.

Claims (10)

1, a kind of magnetic scale comprises:
Pipe; With
Polarizable magnetic element, its close attachment extend to the inside surface of described pipe so that along the longitudinal direction of described pipe;
Described magnetic element is formed with magnetic mark, extremely provides this magnetic mark by a plurality of N utmost points and S along the longitudinal direction arranged alternate of described magnetic element.
2, magnetic scale according to claim 1, wherein said pipe does not have the material of magnetic effect to form by the magnetic force to described magnetic element.
3, magnetic scale according to claim 1, wherein said pipe is formed by nonmagnetic substance.
4, magnetic scale according to claim 1 wherein is adhered to described magnetic element by double sticky tape the inside surface of described pipe.
5, magnetic scale according to claim 1, wherein said magnetic element comprises ribbon element, and its close attachment is to the circumferential section of described pipe internal surface, consequently along the straight extension of the longitudinal direction of described pipe.
6, magnetic scale according to claim 1, wherein said magnetic element comprises the rod type element with the xsect that is full of described pipe entire inner space.
7, magnetic scale according to claim 1, wherein said pipe comprises shaped element, and described magnetic element comprises the shaped element of close attachment on the described pipe total inner surface.
8, magnetic scale according to claim 1, wherein said pipe comprises shaped element, and groove is formed on the circumferential section of described pipe internal surface so that along the straight extension of the longitudinal direction of described pipe, and described magnetic element comprises the ribbon element that matches with described groove just.
9, magnetic scale according to claim 1, wherein said pipe comprises shaped element, and described magnetic element comprises the shaped element with the xsect that is full of half inner space of described pipe.
10, magnetic scale according to claim 1, wherein said magnetic element is formed by resilient material.
CNB2006100820947A 2005-03-29 2006-03-29 Magnetic scale Expired - Fee Related CN100385195C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005093611 2005-03-29
JP2005093611A JP2006275680A (en) 2005-03-29 2005-03-29 Magnetic scale

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CN1847779A true CN1847779A (en) 2006-10-18
CN100385195C CN100385195C (en) 2008-04-30

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US (1) US7353618B2 (en)
EP (1) EP1707921A2 (en)
JP (1) JP2006275680A (en)
KR (1) KR20060105462A (en)
CN (1) CN100385195C (en)

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CN100385195C (en) 2008-04-30
US20060242854A1 (en) 2006-11-02
EP1707921A2 (en) 2006-10-04
JP2006275680A (en) 2006-10-12
KR20060105462A (en) 2006-10-11

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